/*
 * Copyright 2012-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package sf.database.dialect;

import sf.spring.util.Assert;
import sf.spring.util.StringUtils;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Locale;

/**
 * Enumeration of common database drivers.
 * @author Phillip Webb
 * @author Maciej Walkowiak
 * @author Marten Deinum
 * @author Stephane Nicoll
 * @since 1.4.0
 */
public enum DatabaseDriver {

    /**
     * Unknown type.
     */
    UNKNOWN(null, null),

    /**
     * Apache Derby.
     */
    DERBY("Apache Derby", "org.apache.derby.jdbc.EmbeddedDriver", "org.apache.derby.jdbc.EmbeddedXADataSource",
            "SELECT 1 FROM SYSIBM.SYSDUMMY1"),

    /**
     * H2.
     */
    H2("H2", "org.h2.Driver", "org.h2.jdbcx.JdbcDataSource", "SELECT 1"),

    /**
     * HyperSQL DataBase.
     */
    HSQLDB("HSQL Database Engine", "org.hsqldb.jdbc.JDBCDriver", "org.hsqldb.jdbc.pool.JDBCXADataSource",
            "SELECT COUNT(*) FROM INFORMATION_SCHEMA.SYSTEM_USERS"),

    /**
     * SQL Lite.
     */
    SQLITE("SQLite", "org.sqlite.JDBC"),

    /**
     * MySQL.
     */
    MYSQL("MySQL", "com.mysql.cj.jdbc.Driver", "com.mysql.cj.jdbc.MysqlXADataSource", "/* ping */ SELECT 1"),

    /**
     * Maria DB.
     */
    MARIADB("MariaDB", "org.mariadb.jdbc.Driver", "org.mariadb.jdbc.MariaDbDataSource", "SELECT 1") {
        @Override
        public String getId() {
            return "mysql";
        }
    },

    /**
     * Google App Engine.
     */
    GAE(null, "com.google.appengine.api.rdbms.AppEngineDriver"),

    /**
     * Oracle.
     */
    ORACLE("Oracle", "oracle.jdbc.OracleDriver", "oracle.jdbc.xa.client.OracleXADataSource",
            "SELECT 'Hello' from DUAL"),

    /**
     * Postgres.
     */
    POSTGRESQL("PostgreSQL", "org.postgresql.Driver", "org.postgresql.xa.PGXADataSource", "SELECT 1"),

    /**
     * Amazon Redshift.
     * @since 2.2.0
     */
    REDSHIFT("Redshift", "com.amazon.redshift.jdbc.Driver", null, "SELECT 1"),

    /**
     * HANA - SAP HANA Database - HDB.
     * @since 2.1.0
     */
    HANA("HDB", "com.sap.db.jdbc.Driver", "com.sap.db.jdbcext.XADataSourceSAP", "SELECT 1 FROM SYS.DUMMY") {
        @Override
        protected Collection<String> getUrlPrefixes() {
            return Collections.singleton("sap");
        }
    },

    /**
     * jTDS. As it can be used for several databases, there isn't a single product name we
     * could rely on.
     */
    JTDS(null, "net.sourceforge.jtds.jdbc.Driver"),

    /**
     * SQL Server.
     */
    SQLSERVER("Microsoft SQL Server", "com.microsoft.sqlserver.jdbc.SQLServerDriver",
            "com.microsoft.sqlserver.jdbc.SQLServerXADataSource", "SELECT 1") {
        @Override
        protected boolean matchProductName(String productName) {
            return super.matchProductName(productName) || "SQL SERVER".equalsIgnoreCase(productName);
        }

    },

    /**
     * Firebird.
     */
    FIREBIRD("Firebird", "org.firebirdsql.jdbc.FBDriver", "org.firebirdsql.ds.FBXADataSource",
            "SELECT 1 FROM RDB$DATABASE") {
        @Override
        protected Collection<String> getUrlPrefixes() {
            return Arrays.asList("firebirdsql", "firebird");
        }

        @Override
        protected boolean matchProductName(String productName) {
            return super.matchProductName(productName)
                    || productName.toLowerCase(Locale.ENGLISH).startsWith("firebird");
        }
    },

    /**
     * DB2 Server.
     */
    DB2("DB2", "com.ibm.db2.jcc.DB2Driver", "com.ibm.db2.jcc.DB2XADataSource", "SELECT 1 FROM SYSIBM.SYSDUMMY1") {
        @Override
        protected boolean matchProductName(String productName) {
            return super.matchProductName(productName) || productName.toLowerCase(Locale.ENGLISH).startsWith("db2/");
        }
    },

    /**
     * DB2 AS400 Server.
     */
    DB2_AS400("DB2 UDB for AS/400", "com.ibm.as400.access.AS400JDBCDriver",
            "com.ibm.as400.access.AS400JDBCXADataSource", "SELECT 1 FROM SYSIBM.SYSDUMMY1") {
        @Override
        public String getId() {
            return "db2";
        }

        @Override
        protected Collection<String> getUrlPrefixes() {
            return Collections.singleton("as400");
        }

        @Override
        protected boolean matchProductName(String productName) {
            return super.matchProductName(productName) || productName.toLowerCase(Locale.ENGLISH).contains("as/400");
        }
    },

    /**
     * Teradata.
     */
    TERADATA("Teradata", "com.teradata.jdbc.TeraDriver"),

    /**
     * Informix.
     */
    INFORMIX("Informix Dynamic Server", "com.informix.jdbc.IfxDriver", null, "select count(*) from systables") {
        @Override
        protected Collection<String> getUrlPrefixes() {
            return Arrays.asList("informix-sqli", "informix-direct");
        }

    },

    /**
     * Apache Phoenix.
     * @since 2.5.0
     */
    PHOENIX("Apache Phoenix", "org.apache.phoenix.jdbc.PhoenixDriver", null, "SELECT 1 FROM SYSTEM.CATALOG LIMIT 1"),

    /**
     * Testcontainers.
     */
    TESTCONTAINERS(null, "org.testcontainers.jdbc.ContainerDatabaseDriver") {
        @Override
        protected Collection<String> getUrlPrefixes() {
            return Collections.singleton("tc");
        }

    },
    //========== 以下为自定义添加 ===========================
    /**
     * clickhouse 官方驱动,不包含其他第三方驱动,如:com.github.housepower.jdbc.ClickHouseDriver,cc.blynk.clickhouse.ClickHouseDriver
     */
    CLICKHOUSE("ClickHouse", "ru.yandex.clickhouse.ClickHouseDriver", null, "SELECT 1");

    private final String productName;

    private final String driverClassName;

    private final String xaDataSourceClassName;

    private final String validationQuery;

    DatabaseDriver(String productName, String driverClassName) {
        this(productName, driverClassName, null);
    }

    DatabaseDriver(String productName, String driverClassName, String xaDataSourceClassName) {
        this(productName, driverClassName, xaDataSourceClassName, null);
    }

    DatabaseDriver(String productName, String driverClassName, String xaDataSourceClassName, String validationQuery) {
        this.productName = productName;
        this.driverClassName = driverClassName;
        this.xaDataSourceClassName = xaDataSourceClassName;
        this.validationQuery = validationQuery;
    }

    /**
     * Return the identifier of this driver.
     * @return the identifier
     */
    public String getId() {
        return name().toLowerCase(Locale.ENGLISH);
    }

    protected boolean matchProductName(String productName) {
        return this.productName != null && this.productName.equalsIgnoreCase(productName);
    }

    protected Collection<String> getUrlPrefixes() {
        return Collections.singleton(name().toLowerCase(Locale.ENGLISH));
    }

    /**
     * Return the driver class name.
     * @return the class name or {@code null}
     */
    public String getDriverClassName() {
        return this.driverClassName;
    }

    /**
     * Return the XA driver source class name.
     * @return the class name or {@code null}
     */
    public String getXaDataSourceClassName() {
        return this.xaDataSourceClassName;
    }

    /**
     * Return the validation query.
     * @return the validation query or {@code null}
     */
    public String getValidationQuery() {
        return this.validationQuery;
    }

    /**
     * Find a {@link DatabaseDriver} for the given URL.
     * @param url the JDBC URL
     * @return the database driver or {@link #UNKNOWN} if not found
     */
    public static DatabaseDriver fromJdbcUrl(String url) {
        if (StringUtils.hasLength(url)) {
            Assert.isTrue(url.startsWith("jdbc"), "URL must start with 'jdbc'");
            String urlWithoutPrefix = url.substring("jdbc".length()).toLowerCase(Locale.ENGLISH);
            for (DatabaseDriver driver : values()) {
                for (String urlPrefix : driver.getUrlPrefixes()) {
                    String prefix = ":" + urlPrefix + ":";
                    if (driver != UNKNOWN && urlWithoutPrefix.startsWith(prefix)) {
                        return driver;
                    }
                }
            }
        }
        return UNKNOWN;
    }

    /**
     * Find a {@link DatabaseDriver} for the given product name.
     * @param productName product name
     * @return the database driver or {@link #UNKNOWN} if not found
     */
    public static DatabaseDriver fromProductName(String productName) {
        if (StringUtils.hasLength(productName)) {
            for (DatabaseDriver candidate : values()) {
                if (candidate.matchProductName(productName)) {
                    return candidate;
                }
            }
        }
        return UNKNOWN;
    }
}
